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37 lines
957 B
Text
37 lines
957 B
Text
/*
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Copyright 2019 Google LLC
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Use of this source code is governed by an MIT-style
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license that can be found in the LICENSE file or at
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https://opensource.org/licenses/MIT.
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*/
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import '../_version.js';
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let supportStatus: boolean | undefined;
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/**
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* A utility function that determines whether the current browser supports
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* constructing a [`ReadableStream`](https://developer.mozilla.org/en-US/docs/Web/API/ReadableStream/ReadableStream)
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* object.
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*
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* @return {boolean} `true`, if the current browser can successfully
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* construct a `ReadableStream`, `false` otherwise.
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*
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* @private
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*/
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function canConstructReadableStream(): boolean {
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if (supportStatus === undefined) {
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// See https://github.com/GoogleChrome/workbox/issues/1473
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try {
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new ReadableStream({start() {}});
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supportStatus = true;
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} catch (error) {
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supportStatus = false;
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}
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}
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return supportStatus;
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}
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export {canConstructReadableStream};
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